87 the de-tuned LT1 will not run as efficiently on higher grade fuel
No, GM vehicles do not use inertia/reset switches.
Yes, you can use regular gas in your Buick Century. Most models are designed to run on regular unleaded gasoline, typically with an octane rating of 87. However, always check your owner's manual for specific fuel recommendations, as using higher octane fuel than required won't necessarily improve performance or fuel economy.
87 octane
The 3.8 Liter V6 powering the Buick Park Avenue Ultra requires only 87 octane fuel. You can use 89 octane but there is zero benefit in doing so. The Supercharged version may require 89 or 91 octane of that I am not sure. Check the owners manual and use exactly what is recommended.
87 octane
You need 91 Octane, which you can use 93 octane and 89 octane mix. which is Premium and Mid grade fuel.
The 1994 Honda Prelude is best run with 91 octane fuel or higher. The vehicle is designed for use with high octane fuel.
To test the fuel pump relay on a 1991 Buick Roadmaster, first locate the relay in the fuse box under the dashboard or in the engine compartment. Use a multimeter to check for continuity by disconnecting the relay and testing the terminals; there should be continuity between the terminals when the relay is energized. Alternatively, you can swap it with a similar relay in the fuse box to see if the fuel pump operates. If the relay is faulty, it should be replaced.
87
Premium unleaded 98 Octane
Premium Fuel 91 octane.
yes